Melt the butter and whisk with maple syrup, milk, egg and vanilla sugar. Mix the remaining ingredients and stir into the mixture (works best with a spoon or fork, the electric mixer is not necessary.) Do not stir too long, just enough so that the ingredients combine well.
Cover a baking sheet with parchment paper, cut off small heaps from the dough with a teaspoon and place on the paper.
Bake at 190 ° C for 12-15 minutes until the biscuits are light brown. Let cool on a cake rack.
These pastries taste best fresh, but they can be kept for a few days on a plate covered with cling film.